双螺杆泵|单螺杆泵|稠油泵-螺杆泵的性能参数换算鸿海泵业

螺杆泵性能参数换算	The Count of Characteristic Data of Pump Selected
以下各章均列出产品性能表，当用户根据需要在性能表中无法查得轴功率及流量时，可按如下方法近似确定：	When you can"t get the capacity power and capacity from the characteristic table you need count it：
(一)轴功率的换算	(一) The cowt of power
1. 当压力由P变成P₁而粘度、转速不变时，轴功率N： N = (QP₁/3.67η₀)[1+(η₀/η-1)P/P₁] (Kw) 式中: Q、P均为性能表中列出的接近用户需用要的那一组流量(m³/h)及压力值（Mpa）； η、η₀为在性能表标定的流量、压力时对应的总效率及容积效率。它们可在相应的η-P曲线图中查得。曲线均有离散性，按照"随规格的增大而取大值" 的原则进行取值。	1.When the pressure is from P to P1,but viscosity and speed do not change,you count the power N: N =(QP₁/3.67η₀)[1+(η₀/η-1)P/P₁] (Kw) Note: The Q, P is the data that you can get from characteristic table Q(m³/h) and P(Mpa). η,η₀is the corresponding total efficiency and volume efficiency when the capacity and pressure is signed by Q, P. You can get them from η-P Drawing.
2. 当粘度从 E 变成 E₁而压力、转速不变时， N = (QP/3.67η₀)[1+(η₀/η-1)√E₁/E] (Kw)	2. When the viscosity is from E to E₁, but the pressure and speed don"t change, you can count the power: N = (QP/3.67η₀)[1+(η₀/η-1)√E₁/E] (Kw)
3. 转速从 n 变成 n₁时，压力、粘度不变时，轴功率 N： N = (Qpn/3.67η₀n₁)[1+(η₀/η-1)√n₁/n] (Kw)	3. When the speed is from n to n1, but the pressure and viscosity don"t change, you can count the power N: N = (Qpn/3.67η₀n₁)[1+(η₀/η-1)√n₁/n] (Kw)
(二) 流量的换算	(二)　The count of capacity
1. 对于粘度大于50E 的介质，当粘度从E变成 E₁时，流量 Q 变为 Q₁： Q₁= Q/η₀[1-(1-η₀)1/K] (m³/h) K=(√E₁+1.5)/(√E+1.5) 注：η₀为标定流量Q时的容积效率； E、E₁单位恩氏粘度⁰E 。	1. When the Viscosity is from E1 and they are more than 50E, the capacity will be form Q to Q1: Q₁= Q/η₀[1-(1-η₀)1/K] (m³/h) K=(√E₁+1.5)/(√E+1.5)
2. 当转速从n变成n₁而粘度、压力不变时，流量Q₁近似为： Q₁= Q/η₀[n₁/n-(1-η₀)] (m³/h)	2.When the speed is from n to n₁, but the viscosity and pressure don"t change, the capacity Q₁can count approximately: Q₁= Q/η₀[n₁/n-(1-η₀)] (m³/h)